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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 17
KNOWLEDGE BASED SYSTEMS FOR CIVIL & STRUCTURAL ENGINEERING Edited by: B.H.V. Topping
Paper V.1
Common-Objects: An Object Oriented Inference System Shared by Three Construction Knowledge-Bases I. Watson, P. Brandon and A. Basden
Department of Surveying, University of Salford, Salford, England I. Watson, P. Brandon, A. Basden, "Common-Objects: An Object Oriented Inference System Shared by Three Construction Knowledge-Bases", in B.H.V. Topping, (Editor), "Knowledge Based Systems for Civil & Structural Engineering", Civil-Comp Press, Edinburgh, UK, pp 119-125, 1993. doi:10.4203/ccp.17.5.1
Abstract
This paper describes the implementation of an object-oriented inferencing mechanism that is shared by three separate
knowledge-based systems. The inferencing mechanism, called the Agenda Manager, supports both goal-driven backward
chaining and data-driven forward chaining through a network of objects that make up the knowledge bases. Objects in a
knowledge base maintain two values or "truths"; one value they have inferred or assumed based on their own methods, and
the other that can be set by a user. Moreover, there are four classes of objects in a knowledge base reflecting levels of
certainty that the knowledge engineer has in how they infer their values. This division of objects is used by the knowledge
engineer to focus knowledge elicitation and analysis.
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